// 暂时禁用RSocket以避免兼容性问题
// import { RSocketConnector } from 'rsocket-core'
// import type {
//   RSocket,
//   Payload
// } from 'rsocket-core'
// import { WebsocketClientTransport } from 'rsocket-websocket-client'
import type {
  RealTimeMessage,
  RealTimeMessageType,
  SendMessageRequest,
  MessageResponse,
  NewMessagePush,
  MessageStatusPush,
  UserStatusPush,
  TypingStatusPush
} from '../types'
import { NETWORK_CONSTANTS, EVENT_CONSTANTS } from '../utils/constants'

/**
 * RSocket连接状态枚举
 */
export enum ConnectionStatus {
  DISCONNECTED = 'DISCONNECTED',
  CONNECTING = 'CONNECTING',
  CONNECTED = 'CONNECTED',
  RECONNECTING = 'RECONNECTING',
  ERROR = 'ERROR'
}

/**
 * RSocket连接配置接口
 */
export interface RSocketConfig {
  url: string
  keepAlive?: number
  lifetime?: number
  maxFrameSize?: number
  setupTimeout?: number
  maxReconnectAttempts?: number
  reconnectInterval?: number
  heartbeatInterval?: number
  heartbeatTimeout?: number
}

/**
 * 连接状态变化事件
 */
export interface ConnectionStatusEvent {
  status: ConnectionStatus
  error?: Error
  timestamp: Date
}

/**
 * 消息订阅者接口
 */
export interface MessageSubscriber {
  onMessage: (message: RealTimeMessage) => void
  onError?: (error: Error) => void
  onComplete?: () => void
}

/**
 * RSocket实时通信服务
 * 提供WebSocket连接管理、消息订阅推送、心跳检测和自动重连功能
 */
export class RSocketService {
  private rsocket: any | null = null
  private connector: any | null = null
  private config: RSocketConfig
  private status: ConnectionStatus = ConnectionStatus.DISCONNECTED
  private reconnectAttempts = 0
  private reconnectTimer: NodeJS.Timeout | null = null
  private heartbeatTimer: NodeJS.Timeout | null = null
  private heartbeatTimeoutTimer: NodeJS.Timeout | null = null
  private messageSubscribers = new Set<MessageSubscriber>()
  private statusListeners = new Set<(event: ConnectionStatusEvent) => void>()
  private userId: number | null = null
  private token: string | null = null
  private lastHeartbeatTime = 0
  private isDestroyed = false

  constructor(config: Partial<RSocketConfig> = {}) {
    this.config = {
      url: config.url || 'ws://localhost:8080/rsocket',
      keepAlive: config.keepAlive || NETWORK_CONSTANTS.RSOCKET.KEEP_ALIVE,
      lifetime: config.lifetime || NETWORK_CONSTANTS.RSOCKET.LIFETIME,
      maxFrameSize: config.maxFrameSize || NETWORK_CONSTANTS.RSOCKET.MAX_FRAME_SIZE,
      setupTimeout: config.setupTimeout || NETWORK_CONSTANTS.RSOCKET.SETUP_TIMEOUT,
      maxReconnectAttempts: config.maxReconnectAttempts || NETWORK_CONSTANTS.WEBSOCKET.MAX_RECONNECT_ATTEMPTS,
      reconnectInterval: config.reconnectInterval || NETWORK_CONSTANTS.WEBSOCKET.RECONNECT_INTERVAL,
      heartbeatInterval: config.heartbeatInterval || NETWORK_CONSTANTS.WEBSOCKET.HEARTBEAT_INTERVAL,
      heartbeatTimeout: config.heartbeatTimeout || NETWORK_CONSTANTS.WEBSOCKET.HEARTBEAT_TIMEOUT
    }
  }

  /**
   * 连接到RSocket服务器 (暂时禁用)
   */
  async connect(userId: number, token: string): Promise<void> {
    console.warn('RSocket功能暂时禁用，使用WebSocket替代')

    this.userId = userId
    this.token = token
    this.setStatus(ConnectionStatus.CONNECTED)

    // 模拟连接成功
    setTimeout(() => {
      console.log('Mock RSocket connected successfully')
    }, 100)
  }

  /**
   * 断开RSocket连接
   */
  async disconnect(): Promise<void> {
    this.clearReconnectTimer()
    this.stopHeartbeat()

    if (this.rsocket) {
      try {
        this.rsocket.close()
      } catch (error) {
        console.error('Error closing RSocket:', error)
      }
      this.rsocket = null
    }

    this.connector = null
    this.setStatus(ConnectionStatus.DISCONNECTED)
    console.log('RSocket disconnected')
  }

  /**
   * 销毁服务实例
   */
  destroy(): void {
    this.isDestroyed = true
    this.disconnect()
    this.messageSubscribers.clear()
    this.statusListeners.clear()
  }

  /**
   * 发送消息 (暂时禁用)
   */
  async sendMessage(request: SendMessageRequest): Promise<MessageResponse> {
    console.warn('RSocket sendMessage功能暂时禁用')
    throw new Error('RSocket功能暂时不可用，请使用HTTP API')
  }

  /**
   * 标记消息已读 (暂时禁用)
   */
  async markMessageAsRead(messageId: string, conversationId: string): Promise<void> {
    console.warn('RSocket markMessageAsRead功能暂时禁用')
    // 暂时不执行任何操作
  }

  /**
   * 发送打字状态 (暂时禁用)
   */
  async sendTypingStatus(conversationId: string, isTyping: boolean): Promise<void> {
    console.warn('RSocket sendTypingStatus功能暂时禁用')
    // 暂时不执行任何操作
  }

  /**
   * 订阅消息推送 (暂时禁用)
   */
  subscribeToMessages(): void {
    console.warn('RSocket subscribeToMessages功能暂时禁用')
    // 暂时不执行任何操作
  }

  /**
   * 添加消息订阅者
   */
  addMessageSubscriber(subscriber: MessageSubscriber): () => void {
    this.messageSubscribers.add(subscriber)

    // 返回取消订阅函数
    return () => {
      this.messageSubscribers.delete(subscriber)
    }
  }

  /**
   * 添加连接状态监听器
   */
  addStatusListener(listener: (event: ConnectionStatusEvent) => void): () => void {
    this.statusListeners.add(listener)

    // 返回取消监听函数
    return () => {
      this.statusListeners.delete(listener)
    }
  }

  /**
   * 获取当前连接状态
   */
  getStatus(): ConnectionStatus {
    return this.status
  }

  /**
   * 检查是否已连接
   */
  isConnected(): boolean {
    return this.status === ConnectionStatus.CONNECTED && this.rsocket !== null
  }

  /**
   * 获取重连尝试次数
   */
  getReconnectAttempts(): number {
    return this.reconnectAttempts
  }

  /**
   * 手动触发重连
   */
  async reconnect(): Promise<void> {
    if (this.status === ConnectionStatus.CONNECTING || this.status === ConnectionStatus.RECONNECTING) {
      return
    }

    if (!this.userId || !this.token) {
      throw new Error('User ID and token are required for reconnection')
    }

    await this.disconnect()
    await this.connect(this.userId, this.token)
  }

  /**
   * 设置连接状态
   */
  private setStatus(status: ConnectionStatus, error?: Error): void {
    if (this.status === status) {
      return
    }

    this.status = status
    const event: ConnectionStatusEvent = {
      status,
      error,
      timestamp: new Date()
    }

    // 通知所有状态监听器
    this.statusListeners.forEach(listener => {
      try {
        listener(event)
      } catch (error) {
        console.error('Error in status listener:', error)
      }
    })
  }

  /**
   * 设置连接处理器
   */
  private setupConnectionHandlers(): void {
    if (!this.rsocket) {
      return
    }

    // 监听连接关闭事件
    this.rsocket.onClose((error?: Error) => {
      console.log('RSocket connection closed', error)
      if (error) {
        this.handleConnectionError(error)
      } else {
        this.setStatus(ConnectionStatus.DISCONNECTED)
      }
    })
  }

  /**
   * 处理连接错误
   */
  private handleConnectionError(error: Error): void {
    console.error('RSocket connection error:', error)
    this.setStatus(ConnectionStatus.ERROR, error)
    this.scheduleReconnect()
  }

  /**
   * 安排重连
   */
  private scheduleReconnect(): void {
    if (this.isDestroyed || this.reconnectAttempts >= this.config.maxReconnectAttempts!) {
      console.log('Max reconnect attempts reached or service destroyed')
      return
    }

    this.clearReconnectTimer()
    this.setStatus(ConnectionStatus.RECONNECTING)

    const delay = this.config.reconnectInterval! * Math.pow(2, this.reconnectAttempts)
    console.log(`Scheduling reconnect in ${delay}ms (attempt ${this.reconnectAttempts + 1})`)

    this.reconnectTimer = setTimeout(async () => {
      if (this.isDestroyed) {
        return
      }

      this.reconnectAttempts++

      try {
        if (this.userId && this.token) {
          await this.connect(this.userId, this.token)
        }
      } catch (error) {
        console.error('Reconnect failed:', error)
        this.scheduleReconnect()
      }
    }, delay)
  }

  /**
   * 清除重连定时器
   */
  private clearReconnectTimer(): void {
    if (this.reconnectTimer) {
      clearTimeout(this.reconnectTimer)
      this.reconnectTimer = null
    }
  }

  /**
   * 启动心跳检测
   */
  private startHeartbeat(): void {
    this.stopHeartbeat()

    this.heartbeatTimer = setInterval(() => {
      this.sendHeartbeat()
    }, this.config.heartbeatInterval!)
  }

  /**
   * 停止心跳检测
   */
  private stopHeartbeat(): void {
    if (this.heartbeatTimer) {
      clearInterval(this.heartbeatTimer)
      this.heartbeatTimer = null
    }

    if (this.heartbeatTimeoutTimer) {
      clearTimeout(this.heartbeatTimeoutTimer)
      this.heartbeatTimeoutTimer = null
    }
  }

  /**
   * 发送心跳 (暂时禁用)
   */
  private async sendHeartbeat(): Promise<void> {
    console.warn('RSocket sendHeartbeat功能暂时禁用')
    // 暂时不执行任何操作
  }

  /**
   * 处理接收到的消息
   */
  private handleIncomingMessage(message: RealTimeMessage): void {
    // 通知所有消息订阅者
    this.messageSubscribers.forEach(subscriber => {
      try {
        subscriber.onMessage(message)
      } catch (error) {
        console.error('Error in message subscriber:', error)
        if (subscriber.onError) {
          subscriber.onError(error as Error)
        }
      }
    })
  }
}

// 创建默认的RSocket服务实例
export const rsocketService = new RSocketService()